METHODIST COLLEGE

FIRST TERM EXAMINATION

Class: F.3 ______

Answers to Section A should be marked on the Multiple-choice Answer Sheet

while answers to Section B, C and D should be written on the Answer Sheet provided.The Multiple-choice Answer Sheet for Section A and Answer Sheet for Section B, C and D must be handed inseparately at the end of the examination.

Section A: Multiple Choice Questions (20 marks)

1.

The correct sequence of the following biological developments and inventions is

(1)the production of the first cloned sheep(2)the invention of the first microscope(3)the discovery of the 3-D structure of DNA(4)the completion of the Human Genome ProjectA.(1), (2), (4), (3)B.(1), (3), (4), (2)C.(2), (3), (1), (4)D.(2), (4), (3), (1)

2.

Which of the following is not a possible reason for studying biology?

A.To understand how organisms help us.B.To understand how the engine works.C.To prepare for a future career.D.To enjoy life.

3.

Which of the following is not inside the scope of biology?

A.the study of the interactions between organismsB.the study of the passing on of characteristics to the next generationC.the study of the reactions of organisms to changes in the environmentD.the study of changes of the state of matter under different conditions

4.

Which of the following statements about experiments is correct?

5.

A.

Experiments are repeatable.

B.

Experiments are performed by scientists only.

C.

Experiments must not include controls or it would be difficult to interpret the result.

D.

Experiments are done at the very beginning of a scientific investigation.

Which of the following is not an example of excretion?

Directions: The following two questions refer to the following processes:

(1)(2)(3)(4)(5)(6)(7)(8)(9)

IrritabilityProducing offspringMovementMaking food with sunlightBreaking food down to supply energy for activities inside the bodyRemoving wastes produced from reactions inside the bodyGrowthObtaining food for energyWearing Clothes

Which of the above processes is known as nutrition?

Which of the following statements about water is incorrect?

A.Water is a reactant in all chemical reaction.B.Water dissolves various substances and provides the medium for chemical reactions totake place in cells.C.D.

Water provides buoyancy for plants and animals in water.

Sweating helps regulate body temperature.

9.

Which of the following is the fate of excess carbohydrates in the human body?A.It is stored as proteins in the liver and muscles, or as fats under the skin.B.It is stored as glycogen in the liver and muscles, or as proteins under the skin.C.It is stored as glycogen in the liver and muscles, or as fats under the skin.D.It is stored as fats in the liver and muscles, or as glycogen under the skin.

10.

Tennis players often eat bananas during long matches. Which of the following in a banana isimportant during the match?A.carbohydratesB.proteinC.fatD.vitamins

F3 Bio-1st Exam-Paper (sample 1)P.2

11.

The table below shows the results of an experiment using DCPIP solution.Fruit extractXYZ

Amount of fruit extract used to change 1

Which of the following is not a major source of energy even under starvation?A.CarbohydratesB.FatsC.VitaminsD.Proteins

13.

Which food substance may people produce when they work under the sun?A.CalciumB.IronC.Vitamin CD.Vitamin D

14.

People who suffer from anaemia lack

A.calcium.C.vitamin C.

15.

B.D.

iron.vitamin D.

A sample of food was tested for its constituents. The food was crushed into pulp and thefollowing tests were carried out. These are the results:TestIodineClinistix paperFilter paperAlbustix paperResult++(A + was given when the test was positive and a - was given when it was negative.)Which of the following foods do you think was tested?

A.B.C.D.

FoodCheeseBreadAppleChicken

Carbohydrate (%)050200

Fat (%)40210

Protein (%)3012125

Water (%)30367875

16.

Which of the following can be used to test for the presence of starch?A.Benedicts testB.Iodine testC.Test using Clinistix paperD.Test using Albustix paper

17.

Which of the following substances would give a positive result with Benedict's solution?A.celluloseB.starchC.maltoseD.fat

F3 Bio-1st Exam-Paper (sample 1)P.3

18.

Which of the following groups of food has the greatest energy value?Carbohydrate (g)Fat (g)Protein (g) Water (g)A.1006040100B.806050110C.805050120D.1203050100

19.

Which of the following foods would be the best source of carbohydrate?

A.C.20.

cow's milkbeans

B.D.

soya beansmaize

What does the term a balanced diet mean?

A. A diet which contains equal amounts of proteins, carbohydrates, mineral salts andvitamins.B. A diet which contains equal amounts of starch, sugar and fibre.C. A diet with suitable amounts of proteins, fats, carbohydrates, mineral salts and vitamins.D. A diet with plenty of fibre.

Section B : Fill in the blanks (20 marks)

1.

Biology is the study of (a) _______________.

2.

Scientists study the natural world using (b) _______________ _______________.

3.

How do scientists study biology?

Making(c)______4.

Asking a(d)______

Proposing a(e)______

Making a(f)______

Doing(g)______

Drawing a(h)______

(i) ___________ removes heat when it evaporates from the body of mammals. It acts as a(j) ___________ which provides the medium for chemical reactions to take place. It also givesshape and (k) ___________ to organisms.

F3 Bio-1st Exam-Paper (sample 1)P.4

5.

A deficiency of calcium leads to (l) ___________

6.

Complete the table below, which shows the characteristics of plants that explain why plants areorganisms.Characteristic

Why are plants organisms?

Nutrition

Plants make food by carrying out (m) ___________.

(n) ___________

Plants break down food to supply energy for body activities.

Movement

Plants usually move by (o) ___________.

Growth

Plants increase in (p) ___________ and (q) ___________.

Irritability

Plants react to (r) ___________ in their environment.

(s) ___________

Plants produce offspring.

Excretion

(t) ___________ is removed when the leaves fall off.

Section C : Matching (10 marks)

What are the organic chemical constituents of organisms? Match the examples with each constituent.Organic chemical constituents:

Examples:

1. Carbohydrates

a. DNA

f. RNA

2. Lipid

b. phospholipids

g. fat

3. Protein

c. starch

h. antibody

4. Nucleic acid

d. cellulose

i. glucose

e. enzyme

j. oil

Section D : Structured Questions (50 marks)

1.Topic of study(a) Find out how different plant species affect each other(b) Sorting plants into different groups according to their similarities(c) Find out the functions of the genes of a plant species(d) Study the structure of the root hair cells

________________________

Branch of biologyAGeneticsBEcologyCTaxonomyDCytology(4 marks)

F3 Bio-1st Exam-Paper (sample 1)P.5

2. Study objects A to F shown in the photographs below. (Objects are not shown to the same scale)A.

B.

C.

D.

E.

F.

(a) State, using the letters A to F, all the organisms shown.

(4 marks)

(b) Nutrition is one of the seven characteristics of organisms.

(i) Which of the organisms in (a) can make food by itself?(1 mark)(ii) Apart from nutrition, state three characteristics which are common to all the organismsanswered in (a).(3 marks)

(a) In carrying out the Benedicts test for a solid food, the food would be crushed with distilledwater to give the juice.(i)If 2 cm3 of food juice is used for the food test, how much Benedicts solution should beadded to the food juice?(1 mark)(ii) What should be the step after (i)?(1 mark)(iii) Name a sugar that will give negative result to Benedicts test.(1 mark)(b) Describe the positive result for(i) Albustix paper test.(ii) spot test.

(1 mark)(1 mark)

(c) (i)

Based on the results of the above food tests, deduce the food substance(s) found in foodsamples P, R and S.(3 marks)(ii) Hence, state what food samples P, R and S are.(3 marks)F3 Bio-1st Exam-Paper (sample 1)P.6

4. The table below shows the relative food value per 100g of four kinds of raw food in a diet.Raw foodRicePorkFishSpinachCarbohydrates (g)88.7002.8Protein (g)8.312.014.52.2Fat (g)6.439.816.00Calcium (mg)3.510.6100.27.5Vitamin A (mg)000.0815.8Vitamin C (mg)00065Vitamin D (mg)000.0220Dietary fibre (mg)00030(a) It is said that a pregnant mother needs to eat for her developing baby. From the table,which two types of food are important for a pregnant woman? Explain your answer.(3 marks)Constituents of food

(b) Mr Wong suffers from constipation and intestinal disorder. Which food from the above tableis the best for him? Explain.(2 marks)(c) (i)(ii)(iii)

Name one disease that is caused by the deficiency in vitamin A.

(1 mark)What is the function of vitamin A?(1 mark)Besides fish and spinach, suggest another food which is a good source of vitamin A.(1 mark)

5. Read the following story about Johnny and answer the questions.

Hamburger MurderJohnny, 25 years old, an office worker, was found dead in hishome due to heart disease. His mother told the inspector thatJohnny was once a healthy and active man. However, threeyears ago, he was influenced by advertisements and liked goingto a fast food shop. He had got fatter and fatter since then.Before he died, his weight reached 100 kg.The inspector went to the fast food shop and took a nutritiontable:

The inspector bought a set lunch from the fast food shop for tests. The set lunch includes abig hamburger, French fries and a cup of Coke.

F3 Bio-1st Exam-Paper (sample 1)P.7

(a) Calculate the total energy value of the set lunch tested.

(1 mark)

(b) What are the effects to the body if the energy intake is much higher than the energy required?(4 marks)(c) Peter with the same age and sex as Johnny has been eating the same diet. However, Peter didnot become overweight. Suggest two reasons for such a difference.(2 marks)6. The diagram below shows a set-up used by a student in an experiment.

DCPIPOrange juice /

vitamin C solution

4 cm3 2% vitamin Csolution(colourless)

He put 4 cm3 of 2 % vitamin C solution in the beaker and then added the DCPIP solution slowly toit. The volume of DCPIP solution used when the solution just turned blue was recorded. Herepeated the experiment using vitamin C solutions of 3%, 5%, 8% and 10%. The results areshown in the table below.Concentration of vitamin C solution(%)Volume of DCPIP used (cm3)

10

1.5

2.5

(a) Plot a graph of Volume of DCPIP used against Concentration of vitamin C solution onthe graph paper provided on the answer sheet.(4 marks)(b) The experiment was repeated with juice P and juice Q. The volume of DCPIP used was 2cm3 and 3.5 cm3 respectively.(i)

(ii)

Find from the graph in (a) the concentrations of vitamin C in juice P and juice Qrespectively. Hence, state the juice, P or Q, that has a higher vitamin Cconcentration.(3 marks)If the experiment is repeated using juice Q which has been boiled for 10 minutes,will the volume of DCPIP used be greater or smaller? Explain your answer.(2 marks)

(c) Except Benedicts test, suggest another test for finding out whether juice P contains glucose.State the result if glucose is present in juice P.(2 marks)(d) Name the deficiency disease of vitamin C.